news: Update after recent commits
news: Update after recent commits

Mention the hyperv notifier and the new API to set block thresholds.

VenkatDatta/libvirt,VenkatDatta/libvirt,zippy2/libvirt,zippy2/libvirt,crobinso/libvirt,nertpinx/libvirt,datto/libvirt,zippy2/libvirt,fabianfreyer/libvirt,crobinso/libvirt,libvirt/libvirt,olafhering/libvirt,eskultety/libvirt,olafhering/libvirt,fabianfreyer/libvirt,crobinso/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,libvirt/libvirt,crobinso/libvirt,VenkatDatta/libvirt,jfehlig/libvirt,andreabolognani/libvirt,libvirt/libvirt,VenkatDatta/libvirt,datto/libvirt,jfehlig/libvirt,jardasgit/libvirt,eskultety/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,olafhering/libvirt,olafhering/libvirt,andreabolognani/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,datto/libvirt,datto/libvirt,jardasgit/libvirt,eskultety/libvirt,nertpinx/libvirt,datto/libvirt,nertpinx/libvirt,eskultety/libvirt,libvirt/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,eskultety/libvirt,jfehlig/libvirt,jardasgit/libvirt,jardasgit/libvirt,andreabolognani/libvirt,zippy2/libvirt